Abstract
The process safety incidents are directly caused by defects of protection layers, and process safety management (PSM) system should maintain the soundness of the protection layers. In general, the weakness of the PSM system is identified through the incident investigations, and the performance of the PSM has to be improved through the PDCA cycle using process safety metrics. However, PSM business process is comprehended in the plant lifecycle engineering business processes, so that even if the weakness of PSM system is identified, the key engineering business processes for that weakness cannot be recognized, so far. To overcome the above mentioned problem on process safety metrics, we propose the business process model based process safety incident investigation for process safety metrics.
